Schizophrenia and suicide in a North Swedish isolate, 1890-1980

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Abstract
The epidemiological and genetic investigation of schizophrenic psychoses over the period 1900-1978 which was carried out in a specified North Swedish geographical isolate was supplemented with a study of suicides. For the period 1890-1980, a total of 90 suicides were ascertained. Of these, 54 had at least 1 schizophrenic relative at a maximum genetic distance of 1/8, while 11 had schizophrenic relatives further removed. At least some of these suicides were likely manifestations of acute and/or undiagnosed psychoses. The previously reported high general morbid risk of schizophrenia in this population (2.7%) would be a rather conservative estimate. The findings would not appreciably change the morbid risk for 1st-degree relatives of schizophrenic probands.

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